Bridge pier anti-corrosion repairing structure based on marine environment
By constructing a reinforced connection layer and an ultra-high performance concrete structure on the outside of the pier base, the problem of concrete damage caused by ion erosion in the marine environment was solved, thus enhancing the overall integrity and corrosion resistance of the pier and extending its service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2026-03-10
AI Technical Summary
Existing technologies cannot effectively solve the problem of concrete damage to bridge piers caused by ion erosion in marine environments, and conventional repair methods cannot fundamentally extend the service life of bridge piers.
A reinforced connection layer is constructed on the outside of the pier base, including horizontally distributed back bolts and circumferentially distributed steel wire mesh, which are anchored to the pier base. An ultra-high performance concrete anti-corrosion structure is then poured on the outside to form a unified overall structure.
It enhances the overall integrity of the bridge piers, prevents cracking and delamination, extends service life, provides excellent corrosion resistance, and reduces maintenance costs.
Smart Images
Figure CN223983938U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge pier corrosion prevention, and more specifically, to a bridge pier corrosion prevention and repair structure based on a marine environment. Background Technology
[0002] The primary function of bridge piers is to support the bridge structure and withstand various external forces and loads, ensuring the stability and safety of the bridge. However, bridge piers built in complex marine environments suffer from continuous damage and spalling of the concrete surface due to the presence of corrosive ions in seawater and the erosion caused by waves. This further leads to steel reinforcement corrosion, ultimately affecting the macroscopic mechanical properties and severely shortening the service life of the piers. Currently used repair methods include: 1) enlarging the cross-section for reinforcement, which cannot effectively solve the problem of seawater ion corrosion and can only temporarily delay the deterioration process; 2) external steel reinforcement, which can improve the load-bearing capacity and ductility of the pier, but also cannot resist ion corrosion damage; 3) surface spraying of anti-corrosion coatings or application of anti-corrosion films can prevent ion corrosion within their effective time limit, but cannot provide long-term protection for the pier concrete. In summary, conventional technical methods cannot fundamentally solve the problem of ion corrosion damage to bridge pier concrete in marine environments. Summary of the Invention
[0003] The technical problem to be solved by this utility model is to provide a bridge pier anti-corrosion and repair structure based on the marine environment, which can solve the problem of bridge pier concrete being damaged by ion erosion in the marine environment.
[0004] The technical solution adopted by this utility model to solve its technical problem is: to construct a bridge pier anti-corrosion and repair structure based on a marine environment, including a reinforcing connection layer and a functional layer set on the outside of the bridge pier base layer. The reinforcing connection layer includes horizontally distributed back bolts and circumferentially distributed steel wire mesh. The back bolts are anchored on the bridge pier base layer, and the steel wire mesh is circumferentially fixed on the back bolts. The functional layer is an ultra-high performance concrete anti-corrosion structure cast on the outside of the reinforcing connection layer.
[0005] According to the above scheme, the exposed length of the back bolt after anchoring is 50-70mm.
[0006] According to the above scheme, the bridge pier base layer has 5-6 anchor bolts per square meter.
[0007] According to the above scheme, the wire mesh is 40-60mm away from the base structure.
[0008] According to the above scheme, the aperture of the wire mesh is 110-150mm.
[0009] According to the above scheme, the wire diameter of the wire mesh is 3-5mm.
[0010] According to the above scheme, the wire mesh is circumferentially welded onto the back bolt.
[0011] The anti-corrosion and repair structure for bridge piers based on the marine environment proposed in this utility model has the following beneficial effects:
[0012] 1. This utility model adds a back-bolted steel wire mesh composite structure between the base pier concrete and the functional layer ultra-high performance concrete as a reinforcing connection layer, so that the base layer and the functional layer form an effective unified whole, avoiding the risk of cracking, slippage and delamination, and improving the service life of the repaired pier.
[0013] 2. The anti-corrosion repair structure of this utility model is easy to construct, has excellent anti-corrosion performance, requires no later maintenance, and has low overall cost. Attached Figure Description
[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:
[0015] Figure 1 This is a cross-sectional schematic diagram of the anti-corrosion and repair structure for bridge piers based on the marine environment according to this utility model;
[0016] Figure 2 This is a top view of the anti-corrosion and repair structure for bridge piers based on the marine environment of this utility model. Detailed Implementation
[0017] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.
[0018] like Figure 1-2 As shown, the anti-corrosion and repair structure for bridge piers based on marine environment of this utility model includes a base layer 1, a reinforcing connection layer and a functional layer 3.
[0019] The base layer 1 is the existing ordinary concrete structure of the bridge pier. The reinforced connection layer is anchored to the treated concrete base layer 1 of the bridge pier by back bolts 4. At the same time, a layer of wire mesh 2 is fixed in the circumference. After the outer formwork is erected, the functional layer 3 is made of ultra-high performance concrete material, so that the base layer 1 and the functional layer 3 form an effective and unified whole structure.
[0020] Base layer 1 is an existing ordinary concrete structure of bridge piers. High-pressure water guns are used to flush the existing base layer 1 structure to ensure that the damaged structure is removed and the stable sand and gravel matrix is exposed.
[0021] The reinforcing connection layer is a composite structure of horizontally distributed back bolts 4 and circumferentially distributed steel wire mesh 2. After the back bolts 4 are anchored to the treated base layer 1 concrete, the steel wire mesh 2 is then circumferentially welded to the back bolts 4. The exposed length of the anchored back bolts 4 is 50-70mm, and 45-6 back bolts are anchored per square meter. The steel wire mesh 2 is made of stainless steel, is 40-60mm away from the base layer 1 structure, has a hole diameter of 110mm or 150mm, and a wire diameter of 3-5mm.
[0022] Functional layer 3 is an ultra-high performance concrete anti-corrosion structure with an ultra-high performance concrete strength grade ≥ C120, a 28-day drying shrinkage rate ≤ 300με, and a spread of 700±50mm.
[0023] After the construction of the connecting layer is completed, the outer formwork is supported and the pouring thickness of the functional layer 3 is controlled to be 80-120mm. Before pouring the ultra-high performance concrete material, the surface of the base layer 1 structure is kept moist. No vibration is required during the pouring process. After pouring, the formwork is demolded 3-7 days later, and then wet-cured for 7-14 days after demolding.
[0024] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.
Claims
1. A bridge pier anticorrosion repair structure based on a marine environment, characterized by, The bridge pier base layer is provided with a reinforcing connecting layer and a functional layer outside the bridge pier base layer, the reinforcing connecting layer comprises transversely distributed back bolts and annularly distributed steel wire meshes, the back bolts are anchored on the bridge pier base layer, and the steel wire meshes are annularly fixed on the back bolts, and the functional layer is an ultrahigh performance concrete corrosion-resistant structure poured outside the reinforcing connecting layer.
2. The marine environment-based pier anticorrosion repair structure according to claim 1, characterized by, The exposed length of the anchored back bolt is 50-70 mm.
3. The marine environment-based pier anticorrosion repair structure according to claim 1, characterized by, The bridge pier base layer is provided with 5-6 back bolts per square meter.
4. The marine environment-based pier corrosion remediation structure of claim 1, wherein, The distance between the steel wire mesh and the base structure is 40-60 mm.
5. The marine environment-based pier corrosion remediation structure of claim 1, wherein, The aperture of the steel wire mesh is 110-150 mm.
6. The marine environment-based pier corrosion remediation structure of claim 1, wherein, The wire diameter of the steel wire mesh is 3-5 mm.
7. The marine environment-based pier corrosion remediation structure of claim 1, wherein, The steel wire mesh is annularly welded on the back bolt.